JPH0356698A - Barrel plating device - Google Patents

Abstract

PURPOSE:To form a uniform plating layer on many small materials to be plated by placing the materials in a barrel formed by a perforated plate, rotating the barrel in a plating soln. and forcedly agitating the materials by an agitating rod provided in the barrel. CONSTITUTION:The hexagonal cylindrical barrel 4 obtained by connecting the plates 17 having many small holes with a cross piece 16 is supported by fixing rods 19 and 20 between two frames 1 and 2. The rotation of the shaft 8 of a geared motor 7 provided with a reduction gear is transmitted to the barrel through the engagement of gears 9-12, and the barrel 4 is partially dipped in a plating soln. and rotated. Many small materials to be plated are placed into the barrel 4, moved in the barrel along with the rotation of the barrel 4 and forcedly agitated by the plural agitating rods 33. Consequently, all the materials are electroless-plated. When electroplating is applied, a negative voltage is impressed on the rod 33 from a cathode plate 27 to use the material as a cathode through the rod 33, and the material is easily electroplated.

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention applies, for example, to electroplating or electroless plating on the surface of synthetic resin buttons and other parts (articles to be plated) that are attached to clothes. This invention relates to a barrel metallization device for forming a predetermined plating layer.

(Prior Art) Conventionally, as the barrel plating apparatus of the above-mentioned example, there is an apparatus having the following structure, for example.

That is, a pair of standing plates (frames) are provided facing each other with a predetermined interval, and between these pairs of standing plates,
A hexagonal cylindrical barrel that is rotatably driven by an AC motor is mounted on the shaft, and a cylindrical barrel wall is stretched between blind end plates on both left and right ends, and the entire cylindrical barrel wall is made of porous material. This is a partially immersed horizontal barrel plating device made of a plate.

For example, when plating the surface of the above-mentioned parts using the barrel plating device with the conventional structure described above, the agitation of the parts is relatively slow because this barrel plating device uses only passive agitation due to the rotation of the cylindrical barrel. This resulted in problems such as variations in plating thickness and poor adhesion of plating.

(Purpose of the invention) This invention is capable of achieving sufficient agitation of parts through both the agitation action of the parts by the rotation of the cylindrical barrel and the part agitation action of the agitation rod, resulting in a uniform plating film thickness. , it is possible to perform good plating without poor adhesion, and it is possible to apply various plating conditions such as part input amount, part mass, part specific gravity, part shape, plating solution specific gravity, etc.
The objective is to provide a barrel plating device that can obtain the optimal stirring effect corresponding to various plating conditions by replacing the stirring unit according to the plating solution flow rate, plating solution flow velocity distribution, barrel rotation speed, etc. .

(Structure of the Invention) The present invention provides a barrel plating device in which a cylindrical barrel is rotatably supported between a pair of upright plates spaced apart, and a pair of left and right plates located at the axis of the cylindrical barrel. The fixed receiving part is non-rotatably attached to the standing plate, while the upper rod has fitting parts formed at both ends to removably fit into the left and right fixed receiving parts, and the upper rod extends downward from the upper rod. Equipped with an extended stirring bar! The barrel plating apparatus is characterized in that the barrel plating apparatus comprises l number of stirring units, and a plurality of stirring units having different stirring conditions are selectively and replaceably mounted between the pair of left and right fixed receiving parts.

(Effects of the Invention) According to the present invention, when the above-mentioned cylindrical barrel rotates, the parts inside the barrel are actively stirred by the non-rotating stirring rod, so that the above-mentioned parts are shaped like a cylindrical barrel. Good stirring is achieved by the synergistic effect of passive stirring by the rotation of the barrel and active stirring by the stirring rod.

As a result, it is possible to obtain sufficient agitation of the parts, and it is possible to perform good plating with a uniform thickness and no adhesion defects.

Moreover, since we have configured a plurality of stirring units that are replaceably attached to the left and right fixed receivers mentioned above, by selecting and using the stirring unit that corresponds to various plating conditions,
This has the effect of being able to obtain an optimal stirring effect corresponding to the above-mentioned plating conditions.

(Example) An embodiment of the present invention will be described in detail below based on the drawings.

The drawing shows a partially immersed horizontal barrel plating device, with the first
In Figures 1 and 2, a pair of frames 1.2 are provided upright at a predetermined interval, and each of these frames 1.2
A plurality of stays 3 . . . connect the upper centers and the lower corners.

Further, a hexagonal cylindrical barrel 4 is rotatably supported at the lower part between the above-mentioned pair of frames 1.2 so that its cylindrical axis faces in the horizontal direction, while above the above-mentioned cylindrical barrel 4 A motor base 6 is horizontally stretched between the frames 1.2 via two mounting members 5.5.

A DC geared motor 7 equipped with a speed governor is mounted on the motor base 6, and a drive gear 9 is fitted onto a rotating shaft 8 of the DC geared motor 7.

On the other hand, a ring gear 10 as a driven gear is integrally formed on the outer periphery of an end plate 13 (described later) of the cylindrical barrel 4, and between this ring gear 10 and the drive gear 9 described above, a shaft is supported on one frame 1. When the DC geared motor 7 is driven, the cylindrical barrel 4 is placed in the plating solution L through the above-mentioned gears 9, 11, 12, 10 in the direction indicated by the arrow a in FIG. It is configured to rotate in the direction (clockwise).

As shown in FIGS. 2 to 4, the above-mentioned cylindrical barrel 4 has a cylindrical barrel wall 15 stretched between end plates 13 and 14 at both left and right ends.

This cylindrical barrel wall 15 includes cross pieces 16 disposed along the hexagonal ridgeline, and a perforated plate 17 with a predetermined mesh that allows the plating solution L to flow in and out. A lid for loading and unloading parts and a stirring unit, which will be described later, is removably attached to one side, but since the structure for attaching and removing this lid is well known, illustration thereof is omitted.

Further, the above-mentioned cylindrical barrel 4 has a ball bearing 18.1.
The shaft is mounted between the above-mentioned pair of frames 1.2 via 8.

Fixed rods 19 and 20 are non-rotatably attached to the left and right frames 1.2 corresponding to the axis of the cylindrical barrel 4 described above.

One of the fixing rods 19, 20, 20, is inserted into a hole 14a formed in the center of the end plate 14 on one side of the cylindrical barrel 4, as shown in FIGS. 3, 5, and 6. A rectangular concave fixing receiving part 2{ is formed at the proximate end of the fixing rod 20.

Further, a rectangular slide guide 23 is integrally formed on the other fixed rod l9 of the above-mentioned fixed rods 19 and 20 via a small diameter portion 22, and this slide guide 23 has a slider 24 that slides only in the axial direction. At the same time, a coil spring 25 is stretched between the slider 24 and the fixed rod 19.

Then, as shown in FIG. 3, the above-mentioned slider 24 is provided inward of the cylindrical barrel 4 through the hole 13a formed in the center of the end plate 13 on the other side of the cylindrical barrel 4, and the slider 24 is provided at the provided end thereof. forms a fixed receiving portion 26 having a concave square shape.

Here, as each of the above-mentioned fixing rods 19 and 20, a brass rod whose necessary portions are coated with a coating material such as heat-resistant vinyl chloride is used.

By the way, as shown in FIG. 3, a cathode 27 is attached to the back of the right frame 2, the lower end of this cathode 27 is electrically connected to the above-mentioned fixed rod 20, and this cathode 27 is covered with an insulating cover 28. There is.

Also, the fixing rod 1 protruding outward from the frame 1 on the left side
9 is covered with a protective cap 29 made of heat-resistant synthetic resin.

On the other hand, as shown in FIGS. 7 to 10, a plurality of stirring units 30A. 30B, 30
It constitutes C, 30D.

These stirring units 30A to 30D have angular convex fitting portions 31 that removably fit into the left and right fixed receiving portions 26.21,
31 formed at both ends, and a plurality of stirring rods 33 extending downward from this upper rod 32.
. . and stirring balls 34 attached to the lower ends of the plurality of stirring rods 33 .

Each of the above-mentioned stirring rods 33... performs a part stirring action during electroless plating, and performs an energizing action to the parts in addition to the parts stirring action during electroplating.

That is, each of the plurality of stirring rods 33 described above extends from the upper rod 32 into the plating solution L, and by making each length different, the lower end and the lower end of the stirring rod 33... A difference is formed in the distance from the bottom inner surface of the cylindrical barrel wall 15.

In addition, as described above, a brass stirring ball 34 is integrally attached to the lower end of each of the stirring rods 33, which are compatible with electroplating. The stirring rod 33, which is compatible with electroless plating, uses a resin coating on all outer circumferential surfaces, including the upper rod 32 at the top, except for the stirring ball 34, and the stirring rod 33, which is compatible with electroless plating,
The entire outer peripheral surface of the stirring ball 34, including the stirring ball 34, is coated with resin.

Note that in the drawings, the resin coating layer is omitted for convenience of illustration.

During the electroplating described above, the stirring balls 34 and
Apply a negative voltage to the parts by...

Further, as shown in FIG. 4, a perpendicular line (VER) passing through the center of the upper rod 32 and each of the stirring rods 33, which are inclined toward the rotational direction of the cylindrical barrel 4, are connected. The opening angle, ie, the inclination angle θ, with respect to the axis b passing through the center is set to an arbitrary specific value between 5 degrees and 20 degrees.

Here, each stirring unit 30A, 30B shown in FIGS. 7 to 10. The differences between 30C and 30D are as follows.

The stirring unit 30A shown in FIG. 7 includes a plurality of stirring rods 33,
...The tips are arranged on a virtual parabola α with a predetermined curvature, and the intervals between the stirring rods 33, so-called pitches, are set to a predetermined equal interval P1.

The stirring unit 30B shown in FIG. 8 is different from the stirring unit 30A shown in FIG.
The length of these stirring rods 33. ．． The tips of the stirring rods 33 are arranged on a virtual parabola β having the same ratio as the above-mentioned virtual parabola α, and the intervals between the stirring rods 33 are set to a predetermined equal interval P1.

The stirring unit 30C shown in FIG. 9 includes a plurality of stirring rods 33,
...The tips are arranged on a virtual parabola γ having a large curvature, and the intervals between the stirring rods 33 are set to a predetermined equal interval PI.

The stirring unit 30D shown in FIG. 10 has a number of stirring rods 33.
...The tips of the stirring rods 33 are arranged on a virtual parabola α with a predetermined curvature, and the intervals between the stirring rods 33 are set to equal intervals P2 smaller than the above-mentioned interval Pl, thereby increasing the number of stirring rods 33.

In this way, a plurality of stirring units each having different stirring conditions are configured to be selectively and replaceably mounted between the pair of left and right fixed receivers 26, 21 described above.

Note that the total length l of the above-mentioned stirring units 30A to 300 is of course set to such a length that they can be inserted into the cylindrical barrel 4 through this opening when the lid (not shown) of the barrel wall 15 is removed. It is.

To install the above-mentioned stirring unit, for example, the specific stirring unit 30B shown in FIGS. 3 and 4, between the fixed receivers 26 and 21, first remove the lid (not shown) on the barrel wall 15, and then 6. Insert the fitting part 31 on the left side in the drawing into the fixed receiving part 26 of the slider 24 in the state shown in FIG. When the fitting part 31 on the right side and the fixed receiving part 21 are made to face each other, the above-mentioned coil spring 2
5, the right fitting part 31 is fitted into the fixed receiving part 21, and the above-mentioned stirring unit 30B is connected to the other stirring unit 30A. It can be installed interchangeably with 30C and 30D.

The illustrated embodiment is constructed as described above, and its operation will be explained below.

For example, to apply electroplating or electroless plating to parts such as the aforementioned buttons, a large number of parts are placed in a cylindrical barrel.
50-55% of the input amount.

The cylindrical barrel 4 loaded with the above-mentioned parts is crushed to a predetermined extent in the plating solution L as shown in FIGS. 1 and 4, and the cylindrical barrel 4 is rotated in the direction of arrow a by the drive of the DC geared motor 7. With this, plating can be applied to the surface of parts.

In addition, during electroplating, the cathode 27 and the fixed rod 20 are
, the upper rod 32, the stirring rod 33 and the stirring ball 34 to apply a negative voltage to the parts.

During the above-mentioned plating reaction, the parts inside the cylindrical barrel 4 are actively stirred by the non-rotating stirring rod 33. Due to the synergistic effect with the above-mentioned active stirring, good stirring is achieved.

Further, due to the arrangement of the tip of the stirring rod 33 and the setting of the inclination angle θ, the parts are well stirred along the parabolic stirring locus.

In this way, the above-mentioned stirring rod 33... can sufficiently stir the parts, so that the plating film thickness is uniform and
This has the effect of providing good plating without poor adhesion.

In addition, one specific plating condition that corresponds to various plating conditions, such as part input amount, part mass, part specific gravity, part shape, plating solution specific gravity, plating solution flow rate, plating solution flow velocity distribution, barrel rotation speed, etc. By selecting and using the stirring unit from among the plurality of stirring units 30A, 30B, 30C, and 30D based on empirical rules, it is possible to obtain an optimal stirring effect corresponding to the above-mentioned plating conditions.

Note that FIGS. 7 to 10 show the stirring units 30A to 30.
This shows an example of D, and these stirring units 30A~
30D, a large number of stirring units other than the four shown in the figure can be configured by combining units with the above-mentioned inclination angle θ of 5 degrees, units with 10 degrees, units with 15 degrees, units with 20 degrees, etc. .

Regarding the correspondence between the configuration of this invention and the above-mentioned embodiments, although the upright plate of this invention corresponds to the frames 1 and 2 of the embodiments, this invention is limited only to the structure of the above-mentioned embodiments. It's not a thing.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a front view of a partially immersed horizontal barrel plating device; FIG. 2 is a side view of the plating device; and FIG. 3 is a line taken along line A-A in FIG. 1. 4 is a sectional view of the main part along the line B-B in Fig. 3, Fig. 5 is an enlarged sectional view of the main part of Fig. 3, and Fig. 6 shows the stirring unit removed. 7 is a schematic diagram showing an example of the stirring unit; FIG. 8 is a schematic diagram showing another embodiment of the stirring unit; FIG. 9 is a schematic diagram showing another embodiment of the stirring unit. Schematic diagram: FIG. 10 is a schematic diagram showing still another embodiment of the stirring unit. 1.2... Frame 4... Cylindrical barrel 21.26... Fixed receiving parts 30A to 30D... Stirring unit 31... Fitting part 32... Upper rod 33... Stirring rod No. 1 Diagram A-1...Frame 4...Renore 1 in #J Ko1.2...Frame 4...NJ Malenore Figure 2 3

Claims (1)

[Claims] (1) A barrel plating device in which a cylindrical barrel is rotatably supported between a pair of standing plates arranged apart from each other, and a pair of left and right fixed receiving parts located at the axial center of the cylindrical barrel are connected to the An upper rod that is non-rotatably attached to the standing plate and has fitting parts formed at both ends that removably fit into the left and right fixed receivers, and a stirring rod that extends downward from the upper rod. A barrel plating device comprising a plurality of stirring units equipped with the following, and in which the plurality of stirring units having different stirring conditions are selectively and interchangeably mounted between the pair of left and right fixed receivers.